高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

KMgF3 及KMgF3∶Eu2+晶体的射线辐照效应

莫凤珊1,3, 朱国贤1,3, 夏长泰2,3, 石春山3   

  1. 1. 湛江师范学院生命科学与化学学院, 湛江 524048;
    2. 中国科学院上海光学精密机械研究所激光与光电子材料研究与发展中心, 上海 201800;
    3. 中国科学院长春应用化学研究所稀土化学与物理重点实验室, 长春 130022
  • 收稿日期:2005-11-02 修回日期:1900-01-01 出版日期:2006-06-10 发布日期:2006-06-10
  • 通讯作者: 石春山

Effects of Ray Irradiation on KMgF3 and KMgF3∶Eu2+ Crystal

MO Feng-Shan1,3, ZHU Guo-Xian1,3, XIA Chang-Tai2, SHI Chun-Shan3*   

  1. 1. School of Life Science and Chemistry, Zhanjiang Normal College, Zhanjiang 524048, China;
    2. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
    3. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry,
    Chinese Academy of Sciences, Changchun 130022, China
  • Received:2005-11-02 Revised:1900-01-01 Online:2006-06-10 Published:2006-06-10
  • Contact: SHI Chun-Shan

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摘要： KMgF3∶Eu晶体中Eu3+→Eu2+的转换率在低浓度掺杂时接近100%, 完全转换的饱和掺杂摩尔分数为0.29%. 实验条件下, KMgF3晶体的X射线1 h辐照损伤可在约100 h后恢复; KMgF3∶Eu2+晶体经X射线辐照后, 360 nm锐峰发射强度略有降低. 不同剂量的γ射线辐照, KMgF3晶体热释光曲线的各个温度峰强度变化明显不同, 即使小剂量辐照, 造成的损伤也较难恢复, 如γ射线辐照剂量为103 Gy时, 辐照损伤的恢复时间约需30 d. KMgF3∶Eu2+晶体360 nm锐峰发射强度随γ射线辐照剂量增大而呈线性降低.

关键词: 氟化镁钾, 二价铕离子, X射线, γ射线

Abstract: The conversion of Eu3+ →Eu2+ in KMgF3∶Eu is almost 100% at the low dopant concentration and the saturant dopant is 0.29% molar fraction. The irradiation damage of KMgF3 crystal by 1 h X-ray irradiation can recover in about 100 h under experimental condition. After KMgF3∶Eu2+ crystal was irradiated by X-ray, the sharp peak emission intensity at about 360 nm cuts down slightly and the stimulated spectrum was not observed. The changes are obviously different for all thetemperature peak intensities of TLS glow curves of KMgF3 crystal irradiated by γ-ray of different dosages, even if the damage caused by a little dosage irradiation is relatively hard to recover, for example, if the dosage of γ-ray irradiation is 103 Gy, the recovery time of irradiation damage is about 30 d. The sharp peak emission intensity at 360 nm drops linearly with the growth of γ-ray irradiation dosage.

Key words: KMgF3, Eu2+, X-ray, γ-ray

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